defined
return the first argument that is `!== undefined`
3
Versions
MIT
License
No
Install Scripts
Missing
Provenance
Supply chain provenance
Status for the latest visible version.
No SLSA provenance
npm registry signatures
gitHead linked
Without SLSA provenance there is no cryptographic link between this tarball and the public source — the axios compromise (March 2026) relied on exactly this gap.
Maintainers
substackljharb
Keywords
undefinedshort-circuit||or//defined-or
Accepted risks
Findings the reviewer chose to accept rather than block on.
| Source | Rule | Reason | Accepted by | When |
|---|---|---|---|---|
| npm-metadata | suspicious-initial-version | AI (npm-metadata): 0.0.0 is the legitimate published version of this 13-year-old package by trusted author substack with 5.4M weekly downloads. Not a malware indicator. | ai |
v1.0.0
1 finding
LOW
No provenance attestation
provenance
Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.
v0.0.0
1 finding
LOW
No provenance attestation
provenance
Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.